Luke Harding: 'This campaign was designed to invoke your worst nightmare, that something would happen to your children' - video

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Luke Harding was the Guardian's Moscow bureau chief until he was refused entry to Russia earlier this year, the first foreign journalist to be excluded since the Cold War. In his new book Mafia State, he lays bare the intimidation tactics that the FSB used on him and his family in an effort to stop him publishing stories the regime disapproved of